Concrete staining
Staining colors concrete by soaking into the slab rather than sitting on top of it, so the finish wears the way the concrete wears. We use water-based stains for a broad color range and acid stains where a mottled, variegated look is wanted. Existing concrete has to be clean and open first: old sealer, mastic, paint and curing compound all block penetration, and anything left behind shows up as a blotch later.
Age matters. New concrete needs to cure before we stain it, and a slab that has been power washed to death takes color unevenly.